【单选题】The oxygen produced during photosynthesis comes from:
C.
the breakdown of CO2 and H2O
D.
the breakdown of oxaloacetate
【单选题】将函数 y=cos2x- 3 sin2x+1 的图象按向量 a =(m,n) 平移后,得到函数y=2cos2x的图象,则m,n的值分别为( )
【判断题】蹲踞症状是指患儿于行走、游戏时常主动下蹲片刻,蹲踞时下肢屈曲使静脉回心血量减少减轻了心脏负荷,同时下肢动脉受压,体循环阻力增加使右向左分流量减少从而缺氧症状暂时得以缓解。
【判断题】曹植《杂诗·南国有佳人》中”时俗薄朱颜 谁为发皓齿“表达了世俗污浊、难容高洁的怨愤之情。
【判断题】曹植《杂诗·南国有佳人》中“时俗薄朱颜,谁为发皓齿”表达了世俗污浊、难容高洁的怨愤之情。
【判断题】世界上有七百五十多种硬珊瑚,大约三分之二,都能在四王岛找到。
【多选题】焊接结构返修次数增加,会使( )。(基础知识)
【单选题】The government have realized the use the returnees make ______ the experience and skills ________while living abroad.
【单选题】The black hero fought all his life to make black and white people _____.